7220047381 has 4 divisors (see below), whose sum is σ = 7246112812. Its totient is φ = 7193981952.

The previous prime is 7220047361. The next prime is 7220047433. The reversal of 7220047381 is 1837400227.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1635474481 + 5584572900 = 40441^2 + 74730^2 .

It is a cyclic number.

It is not a de Polignac number, because 7220047381 - 2⁵ = 7220047349 is a prime.

It is a super-2 number, since 2×7220047381² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7220047301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13032300 + ... + 13032853.

It is an arithmetic number, because the mean of its divisors is an integer number (1811528203).

Almost surely, 2^7220047381 is an apocalyptic number.

It is an amenable number.

7220047381 is a deficient number, since it is larger than the sum of its proper divisors (26065431).

7220047381 is a wasteful number, since it uses less digits than its factorization.

7220047381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26065430.

The product of its (nonzero) digits is 18816, while the sum is 34.

The square root of 7220047381 is about 84970.8619527894. The cubic root of 7220047381 is about 1932.7692874551.

The spelling of 7220047381 in words is "seven billion, two hundred twenty million, forty-seven thousand, three hundred eighty-one".